From: Eric Blake <eblake@redhat.com>
To: Max Reitz <mreitz@redhat.com>, qemu-block@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>,
Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
qemu-devel@nongnu.org
Subject: Re: [PATCH v2 32/33] block: Pass BdrvChildRole in remaining cases
Date: Tue, 18 Feb 2020 06:53:14 -0600 [thread overview]
Message-ID: <1b65896d-5fa9-5eb9-e0f5-f9ae2fef53fd@redhat.com> (raw)
In-Reply-To: <1b8cc66d-dc0e-bfa8-c060-4decdfa1242a@redhat.com>
On 2/18/20 6:01 AM, Max Reitz wrote:
>>
>> Is it worth an assert(role) somewhere now that you've converted all
>> callers to pass at least one role?
>
> Well, as the commit message states, block_job_add_bdrv() in blockjob.c
> still passes BdrvChildRole=0 to bdrv_root_attach_child(). So it depends
> on what function we’re looking at.
>
> I suppose we could add such an assertion to bdrv_attach_child() because
> we could expect all BDSs to pass some role for their children.
>
> OTOH, maybe a BDS has a legitimate reason not to: Maybe it just wants to
> take some permissions on some BDS without having any real relationship
> to it. Right now, some block jobs do that, well, except they do so
> through the back door of adding the child BDS to the block job object
> (which then passes no child role). So maybe I’d actually rather not add
> such an assertion anywhere.
Fair enough - you have more knowledge of which callers remain that still
have a legitimate reason to not request a role.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
next prev parent reply other threads:[~2020-02-18 13:13 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-04 17:08 [PATCH v2 00/33] block: Introduce real BdrvChildRole Max Reitz
2020-02-04 17:08 ` [PATCH v2 01/33] block: Add BlockDriver.is_format Max Reitz
2020-02-05 13:51 ` Eric Blake
2020-02-06 10:25 ` Max Reitz
2020-02-11 15:30 ` Alberto Garcia
2020-02-04 17:08 ` [PATCH v2 02/33] block: Rename BdrvChildRole to BdrvChildClass Max Reitz
2020-02-05 15:20 ` Eric Blake
2020-02-11 15:31 ` Alberto Garcia
2020-02-04 17:08 ` [PATCH v2 03/33] block: Add BdrvChildRole Max Reitz
2020-02-05 15:24 ` Eric Blake
2020-02-06 10:47 ` Max Reitz
2020-02-06 10:49 ` Max Reitz
2020-02-11 15:35 ` Eric Blake
2020-02-11 15:41 ` Alberto Garcia
2020-02-17 14:40 ` Max Reitz
2020-02-04 17:08 ` [PATCH v2 04/33] block: Add BdrvChildRole to BdrvChild Max Reitz
2020-02-05 15:33 ` Eric Blake
2020-02-06 10:53 ` Max Reitz
2020-02-11 15:37 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 05/33] block: Pass BdrvChildRole to bdrv_child_perm() Max Reitz
2020-02-05 16:14 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 06/33] block: Pass BdrvChildRole to .inherit_options() Max Reitz
2020-02-05 16:18 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 07/33] block: Pass parent_is_format " Max Reitz
2020-02-05 16:26 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 08/33] block: Rename bdrv_inherited_options() Max Reitz
2020-02-05 16:36 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 09/33] block: Add generic bdrv_inherited_options() Max Reitz
2020-02-05 16:48 ` Eric Blake
2020-02-06 11:06 ` Max Reitz
2020-02-04 17:08 ` [PATCH v2 10/33] block: Use bdrv_inherited_options() Max Reitz
2020-02-05 17:14 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 11/33] block: Unify bdrv_child_cb_attach() Max Reitz
2020-02-05 17:24 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 12/33] block: Unify bdrv_child_cb_detach() Max Reitz
2020-02-05 17:26 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 13/33] block: Add child_of_bds Max Reitz
2020-02-05 20:33 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 14/33] block: Distinguish paths in *_format_default_perms Max Reitz
2020-02-05 20:54 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 15/33] block: Pull out bdrv_default_perms_for_backing() Max Reitz
2020-02-05 20:56 ` Eric Blake
2020-02-06 11:19 ` Max Reitz
2020-02-11 15:38 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 16/33] block: Pull out bdrv_default_perms_for_storage() Max Reitz
2020-02-05 21:02 ` Eric Blake
2020-02-06 11:20 ` Max Reitz
2020-02-04 17:08 ` [PATCH v2 17/33] block: Split bdrv_default_perms_for_storage() Max Reitz
2020-02-05 21:25 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 18/33] block: Add bdrv_default_perms() Max Reitz
2020-02-05 21:53 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 19/33] raw-format: Split raw_read_options() Max Reitz
2020-02-05 21:57 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 20/33] block: Switch child_format users to child_of_bds Max Reitz
2020-02-05 22:11 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 21/33] block: Drop child_format Max Reitz
2020-02-05 22:19 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 22/33] block: Make backing files child_of_bds children Max Reitz
2020-02-05 22:45 ` Eric Blake
2020-02-06 11:33 ` Max Reitz
2020-02-11 15:39 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 23/33] block: Drop child_backing Max Reitz
2020-02-05 22:48 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 24/33] block: Make format drivers use child_of_bds Max Reitz
2020-02-05 22:54 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 25/33] block: Make filter " Max Reitz
2020-02-05 23:02 ` Eric Blake
2020-02-06 11:35 ` Max Reitz
2020-02-04 17:08 ` [PATCH v2 26/33] block: Use child_of_bds in remaining places Max Reitz
2020-02-05 23:28 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 27/33] tests: Use child_of_bds instead of child_file Max Reitz
2020-02-11 15:42 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 28/33] block: Use bdrv_default_perms() Max Reitz
2020-02-11 15:46 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 29/33] block: Make bdrv_filter_default_perms() static Max Reitz
2020-02-11 15:48 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 30/33] block: Drop bdrv_format_default_perms() Max Reitz
2020-02-11 15:48 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 31/33] block: Drop child_file Max Reitz
2020-02-11 15:49 ` Eric Blake
2020-02-04 17:08 ` [PATCH v2 32/33] block: Pass BdrvChildRole in remaining cases Max Reitz
2020-02-11 15:53 ` Eric Blake
2020-02-18 12:01 ` Max Reitz
2020-02-18 12:53 ` Eric Blake [this message]
2020-02-04 17:08 ` [PATCH v2 33/33] block: Drop @child_class from bdrv_child_perm() Max Reitz
2020-02-11 15:56 ` Eric Blake
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1b65896d-5fa9-5eb9-e0f5-f9ae2fef53fd@redhat.com \
--to=eblake@redhat.com \
--cc=kwolf@redhat.com \
--cc=mreitz@redhat.com \
--cc=qemu-block@nongnu.org \
--cc=qemu-devel@nongnu.org \
--cc=vsementsov@virtuozzo.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).